Darkflame Cleft is about preserving safe space and the light resource. The group loses when wax, molds, or darkness are allowed to stay unmanaged.
Destroy Eerie Molds with Darkflame Pickaxe or Throw Darkflame, then move out of the Molten Wax they leave behind. Every mold that remains adds pressure, so this is a damage assignment, not optional cleanup.
Assign a reliable interrupt to Paranoid Mind. Do not spend that player’s stop on a minor cast and hope somebody else notices it.
Stay near Candlelight to avoid Smothering Shadows, use the special action button to move it before Umbral Slash, and interrupt Call Darkspawn. Save a defensive and healing cooldown for Eternal Darkness rather than reacting after the light has already failed.
These are execution priorities, not a fixed pull-count route. Verify weekly tuning, affixes, and your tank's route before the key, then use the source and current videos for difficulty-specific details.
If Shadowblast targets you, leave the group before it resolves. The targeted hit is manageable; clipping the stack makes it a group recovery event.